Sharpener for band-cutters.



CHARLES N. DETWILER, or DELTA, OHIO.

SHARPENER FOR BAND-CUTTERS,

Specification of Letters Patent,

Patented May 28, 1907.

Application filed November 28, 1905. Serial No. 289,534.

To aZZ whom it may concern.-

Be it known that I, CHARLES N. DETWILER, a citizen of the United States,residing at Delta, in the county of Fulton, State of Ohio, have inventedcertain new and useful Improvements in Sharpeners for Band-Cutters; andI do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to sharpeners and more particularly to thosedesigned for sharpening the band cutters of threshing machines and hasfor its object to provide a sharpener of this kind which will beextremely simple and inexpensive and which will include means forholding it yieldably in operative position and means for holding itpositively out of operative position.

Other objects and advantages will be app arent from the followingdescription.

In the drawings forming a portion of this specification and in whichlike numerals of reference indicate similar parts in the several views,Figure 1 is an end view of a portion of the threshing machine providedwith the present invention, a part of the thresher being broken away toillustrate the mounting of the supporting arm. Fig. 2 is a perspectiveview of a sharpener removed from the thresher.

Referring now to the drawings, there is shown a threshing machine 5having in its feed chute a horizontally extending band out ter includinga revoluble drum 6 provided with knife plates, which lie in spacedrelation and which extend beyond the periphery of the drum.

A board 8 is located above the band cutter in horizontal position andhas secured thereupon a plurality of U-shaped guides 9 having wings 10at the ends of their legs through which fastening devices are passed anden gaged in the boards. The guides lie in horizontal alinement with eachother and have slidably engaged therein, a supporting arm 11, from whichthere depend a plurality of spaced laterally inclined plates 12 fixed attheir upper ends against theforwardface of the arm and having each aquarter turn between their ends to bring their major transversedimensions longitudinally of the thresher at their lower portions.

The plates 12 extend downwardly between the knife plates 7, onedepending plate lying adjacent to each of the knife plates and the Ydepending plates have removably attached thereto, sharpening devices 13which are movable into and out of engagement with the knife plates whenthe arm 11 is slid in the guide. A head 14 is carried by one end of thearm 11 and engaged between this head and the outermost bracket 9 at oneend of the board 8, there is a helical spring 15 which encircles the armand which is arranged to hold the arm with the sharpening devices 13yield ably in engagement with the knife plates 7.

The opposite end portion of the arm 11 is rounded and threaded andextends outwardly through the side of the thresher 5, and engaged withthis threaded portion which is indicated at 17, there is a wing nut 16which is operable to bear against the side of the thresher, to hold thearm against movement under the action of the spring 15, and to hold thesharpening devices out of engagement with the knife plates.

As shown, the drum 6 is supported by hangers 18 secured to the board 8.

What is claimed is: 1

The combination with a band cutter for threshers having disk-knives of asupporting board, U-shaped guides fixed to said board in registeringalinement with one another, said guides having straight faces, an armslidably mounted in the guides, and having straight faces, plates fixedat their upper ends to said arm and depending therefrom, sharpeningdevices carried upon the lower ends of said plates for engagement withsaid respective diskknives, aspring for forcing said arm to the limit ofits inward movement whereby said sharpening devices will engage saidknives, and means for moving said arm and the knives suspended therefromoutwardly against the tension of said spring.

In testimonywhereof, I aflix mysignature, in presence of two witnesses.

CHARLES N. Witnesses:

H. O. OANFIELD, W. E. FOWLER.

DETW'ILER

